The workforce diversity statistics streaming out of Silicon Valley's biggest companies are beginning to feel a little like deja vu.

On Tuesday, Apple released its workforce numbers, and they look a lot like those from other companies: largely white, Asian and male.

Representation of blacks and Latinos - 6 and 7 percent, respectively, in technical jobs, and 7 and 11 percent overall - is a bit better at Apple. That is closer to national averages than any other company has been, but remains far from the 13 percent of blacks and 17 percent of Latinos that make up the national workforce.

At 30 percent, the number of women companywide at Apple is squarely in the middle of companies that have released such data. Google was the first to do so in May.

The 20 percent of women in technical positions at Apple is slightly better than most, topped only by Pinterest (21 percent) and social commerce site Polyvore (26 percent). Nationally, women make up just over half of the workforce.

Some broad patterns are beginning to emerge from the data technology companies have released. Yahoo and Polyvore, where the CEOs are women, are two of the three companies with the most female workers. Yet the dearth of women in technical positions at those companies - just 15 percent at Yahoo and 26 percent at Polyvore - shows the systemic nature of tech's gender problem. There aren't enough women at any stage of the tech pipeline, and there are barriers to women at every stage (even once they are hired, as a survey released this week by the American Psychological Association points out).

The two oldest companies that have released data, Apple and Hewlett Packard, are the most racially diverse.

The Rev. Jesse Jackson, who has campaigned aggressively for tech companies to release their data, said that though Apple's "numbers are better than some other companies," they are "not comparable to our index in the marketplace."

But he called the release of the data "another barrier coming down."

CEO Tim Cook said in a statement that at Apple, the "definition of diversity goes far beyond the traditional categories of race, gender, and ethnicity," to include "sexual orientation, veteran status, and disabilities."

He pointed to a specialist at a Manhattan Apple Store, Kim Paulk, who is vision and hearing impaired. Paulk, he said, is adored by customers, as is her "seeing iDog."

"Who we are, where we come from, and what we've experienced influence the way we perceive issues and solve problems," he said. "We believe in celebrating that diversity and investing in it."

So far, though, companies including Apple have excluded diversity information such as sexual orientation and age from the statistics they have released. The information that companies have released mirrors the numbers they report to the U.S. Equal Employment Opportunity Commission, which protects against other forms of workforce discrimination but requires reporting of only gender and race data.

Cook echoed other companies in saying that Apple is not satisfied with its numbers.

"We are making progress," he said, "and we're committed to being as innovative in advancing diversity as we are in developing our products."